Anyway, i was doing those exam questions at the end of the chapter and there was a question on F=kx and E=1/2 k x^2 synoptic, ya but i didn't expect it to be that specific..
there's also a quantum physics question from unit 1, wth??

(Original post by futuredoc77)
i'm so screwed... have just starting revising, too late.

Anyway, i was doing those exam questions at the end of the chapter and there was a question on F=kx and E=1/2 k x^2 synoptic, ya but i didn't expect it to be that specific..
there's also a quantum physics question from unit 1, wth??

these A2 papers can be synoptic, meaning they can test us on anything that has been in the previous units as well as the current unit, i.e. stuff from unit 1 and 2 in AS

(Original post by Robofish)
these A2 papers can be synoptic, meaning they can test us on anything that has been in the previous units as well as the current unit, i.e. stuff from unit 1 and 2 in AS

Yes, I AM aware of that. Its just that i didn't expect the synoptic part to be that specific, you know.
I thought it'll be like biology, where you get asked general stuff about enzymes and stuff... its not as specific as say "what is a peptide bond and how is it made?" which would be very specific and we shouldn't be expected to remember... you know what i am saying?

(Original post by futuredoc77)
Yes, I AM aware of that. Its just that i didn't expect the synoptic part to be that specific, you know.
I thought it'll be like biology, where you get asked general stuff about enzymes and stuff... its not as specific as say "what is a peptide bond and how is it made?" which would be very specific and we shouldn't be expected to remember... you know what i am saying?

ye i know what you mean, the only things i can think of them asking is about hookes law in relation to springs in SHM or maybe internal resistance in capacitors

are grav field strength and potential gradient vectors or scalars? And can someone please explain how damping affects resonance as its in the spec but there's not much on it in the book. Thanks for any help!

(Original post by koki234)
are grav field strength and potential gradient vectors or scalars? And can someone please explain how damping affects resonance as its in the spec but there's not much on it in the book. Thanks for any help!

You only get resonance with light damping. I think they are vectors but not certain, according to the holy source of reference (wikipedia) gravitational field strength is a vector pointing towards the centre of mass. With gravitational potential I think it is a vector as the gradient is g so should be a vector.

(Original post by futuredoc77)
like I said, they have asked about an alpha decay in the "exam-style questions" in the book, lets hope none of that stuff pops up tomorrow.

the scariest synoptic for me would be diffraction and waves and all that crap.. i didn't even learn it properly last year... i hope it doesn't come back to bite me in the ass tomorrow..

O there is a simple reason for that!
They are taken from old syllabus papers and they learned about waves fields and nuclear energy. The alpha decay comes from nuclear energy. However the spring constant you need to know!

Also hello robofish! look at the page before can you do the questions i cant understand? thanks vishal!

(Original post by Ram92)
O there is a simple reason for that!
They are taken from old syllabus papers and they learned about waves fields and nuclear energy. The alpha decay comes from nuclear energy. However the spring constant you need to know!

Also hello robofish! look at the page before can you do the questions i cant understand? thanks vishal!

im doing that paper as we speak, except im stuck on Q6, i dunno how though..

(Original post by rbnphlp)
what are the advantages and disadvantages of resonance

That is a bit random. I guess the disadvantages are easier: Can cause large amplitudes in a vibrating system that can break a bridge, building, spring. Advantages? I guess making a large vibration for swings, mixing stuff, buzzers. I can't think of any really.

Thanks, I'm glad you mentioned that. And going on the infamous AQA Biology exam, I'm not holding my hopes high for a straight forward paper. In that case my question would be why does gravitational potential's formula have a negative sign?

(Original post by Chriz M)
Thanks, I'm glad you mentioned that. And going on the infamous AQA Biology exam, I'm not holding my hopes high for a straight forward paper. In that case my question would be why does gravitational potential's formula have a negative sign?

its the way how gravitational potential is defined..
"The work done in moving an object from infinity to the earth's surface"
the negative sign indicates that potential at infinity (zero) is higher than the potential on the earth.so
an abject at earth has negative potential eenrgy so work must be done on the object to lift it towards infinity.